Sorry that I did not clarify my question. I would like to know this device is able to save battery by turning off the bluetooth function temporary while using the audio jack?

Answer

Hi,

Yes, you can turn off the bluetooth function when you connect this speaker to laptop (or handphone) via a 3.5mm Male To Male Stereo Audio Cable.This speaker now operates like a normal external speaker.To the best of our knowledge, this speaker still draws power from its battery as 3.5mm Male To Male Stereo Audio Cable only helps to transfer audio signal from laptop (or handphone) to the speaker.

This 3 in 1 bluetooth speaker has a 3.5mm audio input port instead.I've successfully played music by connecting this speaker to laptop (or handphone) via a 3.5mm Male To Male Stereo Audio Cable (just need to ensure your handphone case is not obstructing the audio jack).